Amplitude balancing for multilevel signal transmission

Optical: systems and elements – Optical amplifier – Correction of deleterious effects

Reexamination Certificate

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C359S333000

Reexamination Certificate

active

10303050

ABSTRACT:
Arrangements are provided for an amplitude balanced optical amplifier. A combination of an optical preamplifier and a gain/loss variation modification device (VMD) is employed. The gain/loss VMD compensates the gain variation across different wavelength channels introduced by the preamplifier. The gain/loss VMD operates based on a gain/loss profile that is complementary to that of the preamplifier. More than one amplifier may be deployed. In addition, feedback control may be applied to either the preamplifier or the gain/loss VMD to dynamically control the performance.

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